I am still in limbo waiting for a possible MS diagnosis, but I was wondering: If you are experiencing numbness and tingling in one particular extremity and it's due to MS, should it happen all the time, regardless of what you are doing? I have tingling that occurs exclusively when I've been lying down for a while, although my leg sometimes feel ever so slightly weaker than the other when I am up and about and I get an off-balance-y, spacey feeling in my head. I'm just wondering if the fact that it only occurs when I'm in a particular position keeps the door open to other issues as a more likely diagnosis than MS. (I have a bulging disc at L4-L5 and L6-S1 from a recent car accident, and the latter was reportedly touching a nerve.)